220-1101 Virtualization and Cloud Computing Practice Test 6 — 15 Questions

Question 1

A technician is deploying a new virtual machine for a development team. The host server has limited physical storage, and the VM will be used for testing software that requires a minimal amount of disk space initially. However, the development team anticipates that the VM's disk usage will grow significantly over time as more software is installed. The technician wants to allocate the required storage in a way that does not consume the entire allotment upfront, allowing the host to overcommit storage. Which virtualization feature should the technician configure for the VM's virtual hard disk?

Choose an answer to begin — your selection is scored in the full session.

Accepted Answer

Thin provisioning. Thin provisioning allows the virtual hard disk to be created with a specified maximum size but only consumes physical storage on the host as data is written to the VM. This enables storage overcommitment, where the host can allocate more virtual disk space than physical storage exists, because the unused space is not pre-allocated. This matches the requirement to avoid consuming the entire allotment upfront while accommodating future growth.

Answer

Thick provisioning (eager zeroed)

Answer

Thick provisioning (lazy zeroed)

Answer

Deduplication

Question 2

A company uses a Type 1 hypervisor to host multiple virtual machines. One VM runs a legacy application that requires a specific MAC address for licensing. The administrator needs to move the VM from the current host to another physical host without changing the MAC address. Which of the following virtualization features should the administrator use?

Accepted Answer

C. Virtual network interface card (vNIC) MAC address assignment. Setting a static MAC address on the virtual network interface card (vNIC) allows the VM to retain its assigned MAC address regardless of which physical host it runs on. This is essential for the legacy application's licensing, which is tied to that specific MAC address. The administrator can configure this in the hypervisor's VM settings before or during migration.

Answer

A. Migration with hardware resource remapping

Answer

B. MAC address spoofing

Answer

D. Virtual switch port security

Question 3

A server administrator needs to apply a critical security patch to a production virtual machine. The patch has the potential to cause the VM to become unstable. Which of the following should the administrator do FIRST to minimize the risk of a prolonged outage?

Accepted Answer

Take a snapshot of the VM. Taking a snapshot captures the VM's current state, including disk data and memory, allowing the administrator to revert instantly if the patch causes instability. This minimizes downtime compared to a full backup, which requires a restore process. Snapshots are designed for quick rollback in virtualized environments like VMware vSphere or Hyper-V.

Answer

Create a full backup of the VM to a separate storage location

Answer

Migrate the VM to another physical host

Answer

Power off the VM before applying the patch

Question 4

A company hosts multiple VMs on a Type 1 hypervisor. The physical host has two NICs configured in a teamed pair for redundancy and load balancing. The administrator creates a new VM and attaches it to a virtual switch that is bound to the NIC team. The VM can communicate with other VMs on the same host but cannot communicate with any devices on the physical LAN. Other VMs on the same host can reach the physical LAN. Which of the following is the most likely cause?

Accepted Answer

The VM is assigned to a VLAN that is not allowed on the physical switch ports.. The VM can communicate with other VMs on the same host but not with the physical LAN, while other VMs on the same host can reach the LAN. This indicates the virtual switch is correctly bound to the NIC team and the host has external connectivity, but the specific VM is isolated at Layer 2. The most likely cause is that the VM is assigned to a VLAN that is not allowed (pruned) on the physical switch ports, so its tagged frames are dropped by the upstream switch, preventing any communication beyond the hypervisor.

Answer

The VM's virtual switch is configured as an internal-only switch.

Answer

The NIC teaming mode is set to fault tolerance only.

Answer

The VM's network adapter is set to the wrong MAC address.

Question 5

A system administrator needs to add a new virtual hard disk to a running virtual machine without powering it off. The hypervisor supports this capability. Which feature should the administrator use?

Accepted Answer

Hot plug. Hot plug (also called hot add) allows a system administrator to add a virtual hard disk to a running virtual machine without powering it off, provided the hypervisor and guest OS support it. This feature leverages the SCSI or SATA hot-plug capability, enabling the virtual controller to detect and enumerate the new disk dynamically. It is commonly used in VMware vSphere and Hyper-V environments to expand storage without downtime.

Answer

Snapshots

Answer

Thin provisioning

Answer

Live migration

Question 6

A system administrator manages a virtualized web server on a Type 1 hypervisor. The web server's memory usage fluctuates significantly throughout the day due to varying traffic. The administrator wants the VM to automatically use only the memory it needs, allowing the hypervisor to reclaim unused memory for other VMs. Which feature should the administrator configure on the VM?

Accepted Answer

Memory ballooning. Memory ballooning is a feature in virtualization that allows the hypervisor to reclaim unused memory from a VM by inflating a 'balloon' driver inside the guest OS, which forces the guest to release memory pages back to the hypervisor. This is ideal for the described scenario where the VM's memory usage fluctuates, as it dynamically adjusts the VM's memory footprint without requiring a reboot or manual intervention.

Answer

Virtual machine snapshots

Answer

Fault tolerance

Answer

CPU hot-add

Question 7

A business uses a cloud service that automatically increases the number of virtual servers during peak traffic hours and decreases them during low usage, all without manual intervention. The policy is predefined in the cloud management console. This scenario best exemplifies which characteristic of cloud computing?

Accepted Answer

Rapid elasticity. Rapid elasticity is the correct characteristic because the cloud service automatically scales virtual server resources up and down based on predefined policies, matching demand without manual intervention. This dynamic scaling—adding instances during peak traffic and removing them during low usage—is the core definition of rapid elasticity in cloud computing, as it allows resources to expand and contract elastically to meet workload changes.

Answer

On-demand self-service

Answer

Resource pooling

Answer

Measured service

Question 8

A web application hosted on a public cloud platform automatically adds virtual server instances during high traffic and removes them during low traffic, without requiring manual intervention. This is an example of which cloud computing characteristic?

Accepted Answer

Rapid elasticity. The scenario describes a web application that automatically scales virtual server instances up and down based on traffic demand, which is the defining characteristic of rapid elasticity. This cloud computing feature allows resources to be provisioned and released elastically, often automatically, to match workload fluctuations. The key here is the automatic scaling without manual intervention, which distinguishes rapid elasticity from other characteristics like on-demand self-service, which focuses on user-initiated provisioning.

Answer

On-demand self-service

Answer

Broad network access

Answer

Measured service

Question 9

A small company hosts its customer-facing web application on a public cloud provider's infrastructure. However, due to regulatory requirements, the company must keep its customer database on a private server located at its own data center. The web application needs to access the database for real-time transactions. Which cloud deployment model best describes this setup?

Accepted Answer

A. Hybrid cloud. This setup combines a public cloud for the customer-facing web application with a private on-premises server for the customer database, which is the defining characteristic of a hybrid cloud deployment model. Hybrid cloud allows workloads to run in separate environments while maintaining connectivity, often via VPN or dedicated circuits, enabling real-time transactions between the public and private components.

Answer

B. Public cloud

Answer

C. Private cloud

Answer

D. Community cloud

Question 10

A company runs a cluster of hosts running a Type 1 hypervisor. The virtual machines (VMs) are configured to ensure that if a physical host fails, the VMs running on that host will be automatically restarted on another host in the cluster. Which feature provides this capability?

Accepted Answer

High Availability (HA). High Availability (HA) is the correct feature because it is designed to automatically restart virtual machines on alternate hosts within a cluster when a physical host fails. HA uses heartbeat monitoring between hosts and the management server to detect failures, then triggers the restart of affected VMs on surviving hosts, ensuring minimal downtime without requiring manual intervention.

Answer

vMotion

Answer

Fault Tolerance (FT)

Answer

Distributed Resource Scheduler (DRS)

Question 11

A company uses a cloud service that allows them to automatically increase the number of web server instances during peak traffic periods and decrease them during off-peak hours. They only pay for the instances they use. This scenario best exemplifies which characteristic of cloud computing?

Accepted Answer

Elasticity. Elasticity in cloud computing refers to the ability to automatically scale resources up or down based on demand. In this scenario, the company automatically increases web server instances during peak traffic and decreases them during off-peak hours, paying only for what they use, which is the defining behavior of elasticity.

Answer

High availability

Answer

Metered service

Answer

Disaster recovery

Question 12

A company uses a cloud service where administrators can provision virtual machines with pre-configured operating systems and applications from a catalog. They can scale the number of VMs up or down as needed, but they are responsible for managing the guest OS and applications. Which cloud service model does this describe?

Accepted Answer

Infrastructure as a Service (IaaS). This scenario describes Infrastructure as a Service (IaaS) because the cloud provider supplies virtualized hardware resources (VMs, storage, networking), while the customer retains full control over the guest operating system and applications. The administrator provisions pre-configured VMs from a catalog and scales them up or down, but is responsible for OS patching, application management, and security within the VM. This aligns with the IaaS shared responsibility model where the provider manages the hypervisor and physical infrastructure, and the customer manages everything above the OS layer.

Answer

Platform as a Service (PaaS)

Answer

Software as a Service (SaaS)

Answer

Desktop as a Service (DaaS)

Question 13

A system administrator manages a cluster of hosts running a Type 1 hypervisor. The administrator needs to move a virtual machine (VM) from one physical host to another in the cluster without turning off the VM or interrupting its services. The hypervisor supports this capability. Which of the following features should the administrator use?

Accepted Answer

Live migration. Live migration (also known as vMotion in VMware environments) allows a running virtual machine to be moved between physical hosts with zero downtime and no service interruption. The hypervisor transfers the VM's memory state and storage access over a dedicated network while the VM continues to operate, then briefly pauses execution to switch over the final state. This matches the requirement of moving a VM without turning it off or interrupting services.

Answer

High availability

Answer

Snapshot

Answer

Cloning

Question 14

A company requires full control over the operating system and applications running on cloud servers. They want to provision virtual machines with their own custom images and manage all software updates themselves. The cloud provider is responsible only for the underlying physical hardware and hypervisor. Which cloud service model should the company use?

Accepted Answer

Infrastructure as a Service (IaaS). Infrastructure as a Service (IaaS) provides virtualized computing resources over the internet, giving the customer full control over the operating system, storage, and applications. The cloud provider manages only the underlying physical hardware and hypervisor, while the customer is responsible for deploying custom images, applying patches, and managing all software updates. This aligns exactly with the company's requirement for full OS and application control with provider responsibility limited to the physical layer.

Answer

Platform as a Service (PaaS)

Answer

Software as a Service (SaaS)

Answer

Desktop as a Service (DaaS)

Question 15

A company uses a cloud service that provides virtual machines. The company administrators have full control over the guest operating systems, install their own applications, and manage security patches and updates. The cloud provider is responsible for the underlying physical servers, storage, and networking. This scenario best describes which cloud service model?

Accepted Answer

Infrastructure as a Service (IaaS). This scenario describes Infrastructure as a Service (IaaS) because the company has full control over the guest operating systems, applications, and security patches, while the cloud provider manages the underlying physical infrastructure (servers, storage, networking). In IaaS, the provider delivers virtualized computing resources over the internet, and the customer retains administrative access to the OS and installed software, which matches the description exactly.

Answer

Platform as a Service (PaaS)

Answer

Software as a Service (SaaS)

Answer

Desktop as a Service (DaaS)